A California couple out walking their dog on their property stumbled across the modern-day bonanza: $10 million in rare, mint-condition gold coins buried in the shadow of an old tree.

This image provided by the Saddle Ridge Hoard discoverers via Kagin's, Inc., shows one of the six decaying metal canisters filled with 1800s-era U.S. gold coins unearthed in California by two people who want to remain anonymous.